How to Use SHA1 or MD5 in C#?(Which One is Better in Performance and Security for Authentication)
.net, authentication, c#, md5, sha1
Solution
Not sure what you mean by automatically, but you should really use `SHA256` and higher. Also always use a Salt (code) with your hashes. A side note, after time has passed, using hardened hashes is far better than using a plain speed-based hashing function. I.e.: hashing over a few hundred iterations, or using already proven hashing functions such as `bcrypt` (which is mentioned below I believe). A code sample for using a SHA256 hash function in .NET is as follows:
byte[] data = new byte[DATA_SIZE];
byte[] result;
using(SHA256 shaM = new SHA256Managed()) {
result = shaM.ComputeHash(data);
}
Will do the trick for you using SHA256 and is found at MSDN.
Sidenote on the "cracking" of SHA1: Putting the cracking of SHA-1 in perspective
Problem
In C# how we can use SHA1 automatically? Is SHA1 better than MD5?(We use hashing for user name and password and need speed for authentication)